Malicious PDF — malware analysis report

Static analysis result for SHA-256 49461b118fe5a920…

MALICIOUS

PDF

88.4 KB Created: 2021-07-16 03:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1aee116ef90ca6ef50515f0db75c593c SHA-1: 994929b5bee06657f97915e366865bb1723e7013 SHA-256: 49461b118fe5a920a40513107357b9c915886ae6644ac43ca0589e6a1e83a218
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to external websites, some of which are hosted on compromised WordPress installations. The presence of these links suggests the document is intended to lure users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pixomot.ru/uplcv?utm_term=parks+and+recreation+summer+camp+2021 PDF link annotation
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/5f048afca2b03df15dfeb038670b44d2/puvaxazagamaj.pdfIn PDF document text
    • http://tuccifamilyonline.com/clients/b/b5/b5aed9f4ae8fd2b300021b46b426cae6/File/nagasiduzelijapawe.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/74e80b74aa4668605bc06f8e37990891/46324062846.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097615c09046---vifuguba.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/gajimov.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/raxodelag.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/gitifilozitikefut.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/f28a6olvv5i4btfkd1b43tkfss/ludazek.pdfIn PDF document text
    • http://arslanemlak.come/file/pogezunu.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ce3c3bf04da---66132548786.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7b9d328269b12eb5590c545322fb5594/petesiterekaminaso.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b918540bab5---46186644969.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609130f1e0384---58771104284.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/22670435686.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/92729467827.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/l4tk3qght7if3h5jbrds2650r0/gideredixobumenabapeba.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/bofixadazivital.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/5moj3labh7ss8ikhakss1bg8qb/25584837120.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/rubegubuwewopilibadidaza.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/6c6955585eb107115299a2ffdf2027fb/bavogeg.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607e180fea66a---60946420313.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/sewunejuwok.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/1a45s3e51cfjs5c8ggvecubks5/90374262667.pdfIn PDF document text
    • http://valeneighbors.com/userimages/41641335094.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/34516368316.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/25228487938.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/a62359b512c2491d6ce0cbaa6530fb52/73905605623.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48D 11116 bytes
SHA-256: 439bab2d70ef96815777dc32b0728c4218bba013b81ffb9f829dc7f6bb61969c
font_01_sfnt_off00010e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A6 17480 bytes
SHA-256: 82c201fd200b999dc7310c45be1fefb345ffbc3a2a119db121a79e56ade87cc7

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